*{
    box-sizing: border-box;
}
body{
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    overflow: hidden;
    margin:0;
    background-image: url(./合照.jpg);
    background-size: cover;
    flex-wrap: wrap;
}
.container{
    display: flex;
    width: 90vw;
}
.select{
    height: 10vh;
    width: 90wh;
}
.select h2{
    top:0;
    color:#fff;
}
.panel{
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    height: 80vh;
    border-radius: 50px;
    color: #fff;
    cursor: pointer;
    flex:0.5;
    margin: 10px;
    position:relative;
    transition: all 700ms ease-in;
}
.panel h3{
    font-size: 24px;
    position:absolute;
    bottom: 20px;
    left:20px;
    margin:0;
    opacity:0;
}
.panel.active{
    flex:5;
}
.panel.active h3{
    opacity:1;
    transition: opacity 0.3s ease-in 0.4s;
}